Coach John Harbaugh also announced Friday that special-teams coordinator and assistant head coach Jerry Rosburg also will be back.
"Cam Cameron has been our offensive coordinator and will continue to be our defensive coordinator, and Dean will be our defensive coordinator," Harbaugh said . "The tradition of this defense will continue, and it will flourish and it will get even better."
"I'm not going to be the same as Chuck," Pees said. "You got to be who you are. It is an incredible opportunity to be a defensive coordinator for anybody in this league, but it's especially humble to be one for the Ravens."
Harbaugh said he only looked at internal candidates for the job. Pees was secondary coach at Miami of Ohio when Harbaugh was a defensive back at the school.
"We go back a long way," Harbaugh said. "If Dean can make me any kind of a player, that shows you the kind of great coach he really is. I've always respected his work, always respected the kind of person he is."
"It was a good year," Harbaugh said. "We turned a lot of things over on offense. We had all young receivers out there for the first time. We had new tight ends for the first time. I thought our players and coaches did a great job."
Cameron's current four-year contract expires next month. He said the length of his new deal is still being determined.
"I'm obviously thrilled," Cameron said. "When you've got the support of (owner) Steve Bisciotti, (general manager) Ozzie Newsome and John ... all our guys, it's exciting. I called Ozzie and said,
Hey, I'm just thrilled to be back.' And Ozzie said,Cam, in our minds, you were never gone.' And that means the world. Obviously, we've got a lot of unfinished business."
Criticized often, Cameron understands that's part of the job.
"I know that goes with the territory," Cameron said. "Criticism is part of the game. It goes with the coordinators, it goes with the quarterbacks. We've got to go out and prove ourselves every week."
Harbaugh said hiring a quarterbacks coach is a possibility.
"I think the quarterback and the offensive coordinator have to be one mind," Harbaugh said. "That really helped Joe grow in this offense. It was direct communication every single day all day long. Whether that will be the best thing to do next year, we're talking about that. Joe will have a tremendous amount of input in that, along with Cam, obviously."